Uhlig, B.P., Kirner, C., Preuss, A.-C., and Wachtmeister, G., “Real-Time Measurement of the Piston Ring Gap Positions and Their Effect on Exhaust Engine Oil Emission,” SAE Technical Paper 2018-01-5006, 2018, doi:10.4271/2018-01-5006.
Measurement techniques for piston ring rotation, engine oil emission and blow by have been imple- mented on a single-cylinder petrol engine. A novel
method of analysis allows continuous and fast real-time iden- tification of the piston ring rotation of the two compression rings, while the mass-spectrometric analysis of the exhaust gas delivers the cylinder oil emission instantly and with a high temporal resolution.
Only minor modifications to the piston rings were made for the insertion of the γ-emitters, the rings rotate freely around the circumference of the piston.